No one was seriously injured, but the blasts led to new clashes, leaving 2 Palestinian men dead and about 30 wounded.
The old and the new clash in odd ways.
The new clash over the trade bill could set off far deeper resentments, analysts said.
But there are elements in common that make every new clash a potential source of broader violence.
At the same time, a growing number of other nations are entering the cyberzone, making for new clashes and alliances.
The last thing it needs is new clashes with students in the streets when universities reopen next month.
The reports that reached Beijing spoke of a heavy police presence today but no new clashes.
As her anger faded, she made another determined effort to avert the new clash of temperament.
Even apart from the new clash in southern Iraq, there were signs that Baghdad would pose continuing problems.
"Do what you want," her mother wrote in 1994, when new clashes had broken out in Beirut.